Hoist



- R. PAYSON July 2, 1935;

HOIST Filed Nov. 16, 1935 2 Sheets-Sheet l ENTOR w BY 7 ATTORNEY R.PAYSON July 2, 1935.

HOIST ATTORNEY Patented July 2, 1935 f 4 2,006,476 nors'r RudolphPayson, Flushing, N. Y. Application November 16,1933, SerialNm 698,24012 claims. (01. 254- 187) Myinvention relates to hoists and while it isI th d awin s formin part f t s app not limited to a particular use Ihave embodied tion, it in a hoist adapted for raisin and lowerin Figure1 is an l vati n f th h i ti app ash cans. Hoists of this charactergenerally confetus mounted on the pp ehdhf the mast, 5 sist of'anextensible mast mounted in a pit or in hoisting mechanism including y:invention in 5 a cellar so that the mast may be extended to a the p f rform, osition reaching above the sidewalk level and it Figure 2 s a n ad l vati n f part f is provided with means at the top of the mast forthe hoisting mechanism w parts breken way, operating through a rope orcable to raise and Figure 3 is an elevation f p t Of h device lower ashcans from the pit or cellar to the sideshown in Figure 2 With portsbroken w to 10 walk level and vice versa. The present inven- Show theinterior Construction, tion is especially useful when adapted to a hoistFigure 4 i a cross s c onal vi w of the drum I of this character vandwhich is driven by a motor, Shaft and ShOWing a ai 0 3 u t d o at leastwhile a load is being raised. i Said shaft, 7 One object of theinvention is to provide a Figure 5 is a p t v vi w of a portion f 1hoist of the character stated, having a Winding the controlling leverwhich causes the disendrum on which the rope or cable is woundandgagement 0f the Clutch, loosely mounted upon a shaft, together with aFigure 5 is Sectional View he the line clutchmember keyed to said shaftto revolve of Figure therewith and adapted to be moved into clutch-Figure 7 is a sectional w taken on the l 20 ing engagement with saiddrum whenever it is of Figure UNITED'STATES PATENT OFFICE desired tohave the drum operated for the pur- Figure 8 i5 Sectional V w S w a modfied pose ofraising a load. The clutch member is form of Clutch,normally engaged with the drum so that the lat- Figure 9 s a sectional vw ta n t l n ter is driven except when disengaged by manualof Figure a d25 ly controlled means. My invention also relates Figure 10 i5 'P D e Vw f One O the to a novel device for causing the clutch member Parts Ofthe mechanism; l v to engage and disengage the drum. This clutch Thereis a SubStantiahy'U ap me I is independent of the gearing by means ofwhich s a b 2 mounted revolvobly on t e d the power is transmitted fromthe motor to the of mast section 3 a d the Working p s of t 30 drum;that is, th clutch may be operated withpresent invention are mounted onthis frame in out hiftin any of t gears; order to be swung aroundthe'mast to accommo- Another object of myinvention is to provide a datethe device to meet VaI'iQuS conditions the brake band actingfrictionally on the winding use of the tdrum and controlled by manualmeans so that The Shaft 4, Shown as extending yof e 35- the retrogradeor lowering movement of the mast; is the u e aft of the motor 5 suit-'-d may b t n d'b f i t brake ably mounted onthe frame I and from thismotor dependent of th t h; t t, i t ay t brakshaft the drum shaft 6 isdriven as follows: There ing action and clutching action are performedis Worm carried by and fixed h motel through separate devices, althoughcontrolled Shaft 4 and arranged in a Suitable housineaming the load ThlSworm meshes with and drives the worm gear through a common control, perm9 which is also arranged in the houslng 8 and i to be lowered by gravityundermanual control while the clutch is disengaged from the'drum. Whlch1S keyed on the Shaft by means of the key Ii] so that when the worm gearrevolves the Another object of the invention is to provide a h ft 6 1simple and manually operated break joint lever s i g g z 3' f t 11 h bymeans of which the lin the brake and a shait is s hown zlis osed t h t 1t t l i controller for controlling the motor, may all be mote; Shaftfrom gvhich it s i gi s operated from a single lever by manual controlmounted in Suitable bearings meal bracket H Which Permits the c c n thebrake to be bolted or otherwise secured to the U shaped frameho s p tactuated and with the controller I and also in the hub portion l2 of thehousing a. tomatically actuated in accordance with the opwinding drum 3'provided with a hub oration of the clutch. Other advantages and I4mounted to revolve freely on the shaft G-ex: oblects will be set forthin the following detailed cept when gripped-by the clutch member. This55. description ofnmy invention. V V i winding drum has a peripheralpocket litoperposite faces of these two washers.

mit the winding cable to be wound therein between the side flanges l 6.

The drum has a flange-like extension I! having a friction surface 18with which the braking device co-operates, as will be hereinafter setforth. The winding drum has on its perimeter a tapering orfrusto-conical clutch surface is with which the cone clutch is adaptedto engage.

The cone clutch including a circular body 20 is also mounted on theshaft 6 in a manner to per mit it to be moved slightly lengthwise of theshaft, but it is keyed to the latter by means of a key 2| so that theclutch member is compelled to revolve with the shaft. This clutch memberhas a tapered or frusto conical surface 22 which is parallel to andadapted to engage the corresponding clutch surface IQ of the drum sothat when the clutch member is pressed to the right in Figure 6 or inFigure 7, its tapered surface will engage: the tapered surface of thedrum and cause the latter to be looked with the clutch, whereupon thewinding drum will be revolved with the shaft 5 through the. action ofthe cone clutch. There is a coiled spring 23 surrounding the shaft 6with one end pressing against the left face of the clutch memher andwith its opposite end pressing against a washer 2a which itself pressesagainst one face of the hub 25 of the bracket H. The tendency of thisspring is atall times to press the clutch into engagement with thefriction surface of the drum and it may be said that the normalcondition is that in which the clutch grips the drum.

I have provided novel means for holding the winding drum in properposition upon the shaft 6 and for holding the shaft against axialmovement. In Figure 6 I have shown a circumferential groove 28 in theshaft 6 and a washer 21 consisting of two half; circular and annularmembers which are adapted to be assembled so that they extend into thegroove 26 of the shaft and project laterally beyond the outer diameterthereof.

There is another washer 28 consisting of a complete annular ring or, inother words made in one piece, which fits over the two half washers 2! Hfor the purpose of retaining the latter in assembled condition upon theshaft. The two-piece and one-piece washers both rest against one end ofthe hub l2 of the housing and one end of the hub E4 of the winding drumrests against the op- It will be seen that the split or two-piece washermay be assembled to extend into the grooves 2 6 0f the shaft and thenthe one-piece washer 28 may be applied to the periphery of the separablewasher, so that the latter is held in assembled position upon the shaftand the washers themselves will be retained place by the members whichthey hold separated. These washers prevent the drum from moving to theright on the shaft 6 beyond the point where the end of the hub M of thedrum engages the washers. The winding drum being held againstlongitudinal movement in one direction permits the clutch to be forcedagainst the friction surface of the drum.

There is a second annular groove 29 formed in the shaft B adjacent theleft hand end of the hub it of the winding drum. There is a washer 30consisting of two half circular members which, together, form an annularring assembled around the shaft so that the two halves of the washerextend into the groove '29. This washer forms an abutment for the lefthand end of the hub M, of' the winding drum, so that the drum cannotshift to the left inFigure 6. The drum is, thereforeg freeto; revolve onthe shaft but is prevented from moving lengthwise thereof by the severalwashers which I have just described. Preferably, the two halves of theWasher 30 are secured after being assembled in the groove 29 to the lefthand end of the hub i 4 of the drum by means of screws 3| which passthrough apertures in the halves of the washer as and are threaded intothe ends of the hub l4.

As stated above, the clutch member is movable lengthwise of the shaft inrelation to the drum and is keyed to the shaftso that it always revolveswith it and the drum revolves only when the clutch members are engagedwith each other.

I have provided a third peripheral groove 32 in the shaft 6 and thereare assembled in this groove two halves of an annular washer 33, eachforming a semi-circle so that they may be assembled laterally. upon theshaft with the inner portions of the washer extending into the groove32. There is a washer 2d of L-shaped cross section, the inner, peripheryof which fits the outer periphery of the shaft 6. The L-shaped space 33in this washer engages both the side face and the. periphery of the twosections of the washer 33 and one face of the washer 24 engages againstone end of the hub 25. The washer 24 therefore holds the two-part washer33 assembled on theshaft. One end of the coiled spring 23 which forcesthe clutch member towards the winding drum, presses against the washer24 so that the action of the springis to press the washers 24, 33 andtherefore the shaft 6 in one direction and to press in the oppositedirection against the clutch memberfil. The shaft cannot move axiallybecause of the washers 21, 28 so that the action of the spring causesthe clutch member to be moved towards the winding drums.

The device for withdrawing the clutch member 20 to discontinue the driveof the winding drum consists of the following: There is a plate 34having opposite extensions 35 to receive therethrough the bolts 38.which are threaded into bores of the rods 31. These rods are mounted tomove axially in the bearings parallel with the shaft 6, two such rodsbeing shown disposed 180 apart in Figure '7. Each of the rods 31 has ablock or head 38 on its right hand end in Figure 7, and these heads areadapted to be passed through the annular aperture 39 in the wall 40formed as part of the clutch member.

The heads 38 are adapted to be passed through the slot 39 when so turnedas to present the major axis of the heads lengthwise of the slot 39until the heads enter the annular pocket 4| formed within the clutchmember. After these heads have been passed into the pocket 4! the rods32 are turned so that the heads 38 have their major dimensions extendingacross the opening 39 so that the ends of the heads engage the righthand side of the wall 40 and permit the rods 3'1 to move the clutchmember to the left in Figures 6 and 7. .,As the opening is of annularshape, as is also the pocket 4| it will be obvious that the clutchmember which is keyed to the shaft 6 can revolve in relation to the rods3'! while the rods are always capable of moving the clutch member to theleft to release the drive action on the winding drum. I have provided apin 42 extending through each rod 37 with the ends of the pin projectingbeyond the rods and extending into grooves or slots 43 in the bearings38 of the frame, so that when the heads 38 have been properly assembledin the pockets 4! the rods 3| cannot turn'because the pins 42 engage inthe slots 43 to hold the rods from turning and there Ill) by prevent theheads member 38 of the frame and the other end abut.

ting against the pin which extends through each rod 31 and projectslaterally beyond the same, astshown in Figure '7; These springs have atendency to move the rods 31 to the right as far as will be permitted bythe heads of the bolts 36 and they prevent the bolts from moving to theleft except when the plate 34 is so moved in the manner hereinafterdescribed. The springs 44 also tend to move the heads 38 slightly fromthe wall 49 of the clutch.

I prefer to provide seated in the recess and disposed around the reducedend of the shaft 6. This bearing lies between the plate 34 and the leverarm.

It has been stated that the clutch member is forced to the right, asshown in Figures 6 and 7 by the spring 23. The means for forcing theclutch member to the left to release the drive of the drum is asfollows: On the left hand end of thehub 49 which forms a part of thebracket H there are formed teeth 50 around the hub, which teeth havestraight sides and slanting sides. The lever arm 48 pivoted on the lefthand end of the shaft 6' has the hub 5| one end of which has a setofteeth 52 facing the teeth 50 and adapted to mesh, therewith. Whenthese teethare in mesh the position of the hub 49 of the lever 48 willbe such as to permit the clutch member to be engaged with the drum; butas will be described hereinafter, the lever may be turned so that theteeth 52 rise on the teeth 59 and thus force the plate 34 to the left inFigures 6 and '7.

The brake device is as follows: There is a flexible brake band 53 whichis shown as having one end secured to the wall 54 by means of rivets 55and this band extends upwardly and around the brake surface It of thedrum, the magor portion a ball bearing 46 partly end of thebrake band isconnected with a cross member 55 or lateral arm of means of a nut thebrake band, as shown more fully in Figure 3. This brake band is linedwith a lining 51 of leather or other suitable material, which isattached to the which is in direct engagement surface I8 of the windingdrum. parent that this brake band may be loosened upon the surface It)by the movement of the lever 48 in the manner hereinafter de scribed.

I have shown simply the well known controller box 58 by means of whichthe motor 5 is controlled; that is to say, there is a shaft 59 extendingfrom this box and it willbe understood that a suitable switch within thebox controls the supply of current to the motor, so that by oscillatingthe shaft 59 the motor may be turned on or off. There is a crank armlifl fixed to the shaft 59 and it is pivotally with the friction It willbe aplink 61 which latter is also pivotally connected at 62 with a handlever ,63. This latter lever is pivotally connected at 64 with the leverarm 48 by novel means which permits the arm 63 to be moved in onedirection without arm 48, but which servesto move one direction,startingfrom a normal or intermediate position of thearm 63. For thispurpose I have .shown anabutmentv surface 65 onthe 41 of the platemember 34 56 which is threaded onto the.

band and forms a lining tightened or,

exterior or shell of any moving the lever the latter in operating arm 63which is adapted, when the parts are in the position shown in Figure 2,to

Operation As has been stated, the cone clutch is normally engaged withthe clutch member of'the winding drum and let it be assumed that theoperator desires to raise a load higher level by means and describedherein. hook 69 is at the lower of the apparatus shown level and thatsufficient of the cable 19 has been paid off from the drum to allow thehook to'be in the lower position. The ash can or whatever other body isto be raised may be hung on the hook 69 while it is in its lowerposition.

To raise the load the operator moves the lever arm 63 from thefull lineposition of Figure 2 to the right hand dotted line position. In thismovement of the lever arm 63 it pivots on the pin 64 but it does notchange the position of the lever arm 43 to which it is attached. Themovement of the lever arm 63 in the operation just described effects,through the link BI and the lever arm 69 the rocking of the shaft 59 inthe direction necessary to close the switch in the controller box, andthus set the motor into operation. The motor will operate through theworm I to revolve the worm gear 9 and as the latter is keyed to theshaft 6 itwill operate this shaft. As the clutch member is normallyengaged with the clutch portion of the winding drum and as the clutchmember is keyed to the shaft B the winding drum will be operated in thedirection necessary to reel up the cable Hi and to lift the load Theoperator may, at any time, release, the lever arm 63 whereupon it willbe drawn back from the right hand dotted line position to the full lineposition in Figure 2 by the spring (not shown) in the controller box.Generally the lever arm 63 will be released when the load has beenraised to the desired level. If, howeventhe operator should fail torelease this lever arm by the time the load reaches the highestposition, the block H which carries the hook 69 will engage the leverarm 12 and swing it upwardly. This lever arm actuates a switch (notshown) to disconnect the current from the motor, so that the latter willbe stopped when the load is in its higher position, even though theoperator should neglect to release the lever arm 63.

The ash can may be lifted off the hook 59 and the contents discharged.Whenever it is desired to lower the empty can, it is hung on the hook.

effected bygravity in the from the lower to the Let us assume that theas this motion of the lever arm takes place, the

teeth 52 on the hub of the the inclinations of the teeth lever arm 48rise on 59 0f the hub 49 so rent is cut off from that the lever arm 48is forced to the left in Fig ure 6 by the action of the slanting teeth;and this moves the plate 34 to the left in Figures 6 and 7. As the rods31 are attached to the plate 34 they are also moved to the left inFigure '7 and the heads 38 move the clutch member to the left in Figures6 and 7 so that this clutch member is disengaged from the clutch portionof thewinding drum. This releases the winding drum from drivingconnection with the shaft 6 and permits the winding drum to turn inreverse direction to that which it turned when the load was beingraised. If the lever arms 63, 48, are moved further to the left, or tothe position shown in dotted lines F3 in Figure 2, the arm 55' which isconnected to the free end of the brake band will also be moved to theleft and this will tighten the brake band around the friction surface l8of the brake drum and apply the necessary braking action to prevent thesudden dropping of the load. By regulating the braking action throughthe lever arms S3, 38 the speed of lowering of the load may becontrolled as desired. While the lever arms 63, 48 are the left handposition in Figure 2, ourthe motor in the controller box 58 and in fact,the only time that the motor is supplied with current is when the leverarm 63 is in the dotted right hand position in Figure 2. After the loadhas been lowered into the desired position the lever arm 63 may bereleased and it will be returned to the full line position in Figure 2by the action of the co-operating teeth 52, 53 and by the spring 23.

When the lever arms '63, 48 return to the full line position of Figure2, the spring 23 will press the clutch member into clutching engagementwith the clutch portion of the winding drum, whereupon the latter willbe restored to the condition necessary for the raising of the next load.

From the above it will be apparent that I have provided a simple andeifective'device for raising and lowering bodies in connection with ahoist. There is no necessity of shifting any of the gears to control theclutch action and the clutch is operated independently of the gears. Byhaving the clutch normally engaged with the drum, the latter cannotunwind or race after the load has been lowered. The device for drawingthe clutch out of engagement with the winding drum is both simple andefiective. The spring 23 which moves the clutch into engagement with thedrum reacts upon the shaft 6 and this not only simplifies theconstruction but it makes it unnecessary to apply the thrust of thisspring against other parts of the device. The common operating levercontrols in a novel manner the throwing out of the clutch, the throwingin of the brake, and it also controls the starting and stopping of themotor.

While I am not the first to use a single control for throwing out theclutch and for controlling the motor, I believe I am the first to havethis common means also control the brake, and the mechanism throughwhich the common lever or control operates is, I believe, entirely new.

In Figures 8 and 9 I have shown how a different form of clutch may beused instead of the cone clutch described above. Herein the clutchmember 14 is operated in the same manner as the the previously describedform, but instead of this member having a frusto conical surface to lockagainst a corresponding surface of the winding drum, I have providedprojections 75 extending from the right hand face of the member 14 andbeing disposed radially around the same.

These projections are adapted to move in between interlocking members 16projecting from the vertical wall of the winding drum. This forms apositive or jaw clutch engagement. When the clutch member 74 is in itsright hand position in Figure 9, the projections 75 interlock with theprojections '16 and the winding drum is then positively driven by theclutch member 14. When the clutch member M is moved to the leftsufiiciently to disengage the projections 15 from the cooperatingprojections '56 the winding drum will cease to be operated through theclutch. In other respects this device operates the same as in the formof the invention first described.

Having described my invention, what I claim is:

1. A hoisting apparatus including a drum shaft, a winding drum mountedto revolve upon said shaft, said shaft having a peripheral groove, awasher composed of separable sections adapted, when assembled aroundsaid shaft, to extend into said groove and to abut the end of the hub ofthe winding drum, and another Washer forming a complete annular ring,adapted to be assembled around said separable washer to lock the same inassembled position around said shaft.

2. In a hoisting apparatus a drum shaft, a winding drum mounted torevolve upon said shaft, a motor, gears through which said motoroperates said drum shaft, a clutch member independent of said gears andmounted to slide axially on said drum shaft and having means for causingsaid clutch member to revolve with the shaft, a spring around said drumshaft acting on said clutch member to force it into clutching engagementwith said drum, said drum shaft having a peripheral groove, a washercomposed of separable segments adapted to be assembled to form a ringaround said drum shaft and to project partly into said peripheralgroove, a onepiece washer engaging one face and the periphery of saidfirst washer to hold said first mentioned washer in assembled position,one end of said spring acting against said second mentioned washer, andmanual means for moving said clutch to disengage it from said windingdrum.

3. A hoisting apparatus including a frame, a drum shaft mounted in saidframe, a winding drum mounted to revolve on said shaft a clutch memberhaving means causing the clutch memher to revolve with the shaft, aspring surrounding said shaft for normally pressing said clutch memberinto clutching engagement with said drum, and means for moving saidclutch member in opposition to said spring to disengage it from saidwinding drum, including teeth on said frame, a manually operated leverhaving teeth co-operating with said first teeth whereby said lever, whenturned, is caused to move axially, a plate co-operating with said leverso that it is moved axially therewith, rods connected with said plateand having elongated heads, said clutch member having an annular pocketand having an annular opening communicating with said pocket, said rodsextending through said annular openings and with said heads engaging insaid pockets to cause lateral movement of said clutch member whenactuated by said lever.

4. A hoisting apparatus including a drum shaft, a winding drum mountedto revolve on said shaft, a clutch member mounted on said shaft andhaving means for causing the clutch member to revolve with said shaft, aspring tending to move the clutch member into clutching engagement withthe drum, and manually operated means for disengaging the clutch fromthe 75 drum, including teeth on said frame, a manually operated leverhaving teeth co-operating with said first teeth whereby when said leveris turned said teeth will cause axial movement of said lever, a plateadapted to be moved by the axial movement of said lever, rods mounted toslide axially in said frame, and connected with said plate, enlargedheads on said rods, said clutch member having an annular pocket toreceive said heads, and having an annular opening through which saidrods project.

5. A hoisting apparatus, including a drum shaft, a winding drum mountedto revolve on said shaft, a clutch member mounted on said shaft andhaving means for causing the clutch member to revolve with said shaft, aspring tending to move the clutch member into clutching engagement withthe drum, and manually operated means for disengaging the clutch fromthe drum, including teeth on said frame, a manually operated leverhaving teeth co-operating with said first teeth whereby when said leveris turned said teeth will cause axial movement of said lever, a plateadapted to be moved by the axial movement of said lever, rods mounted toslide axially in said frame, and connected with said plate, enlargedheads on said rods, said clutch member having an annular pocket toreceive said heads, and having an annular opening through which saidrods project and pins in said rods engaging in grooves in said frame toprevent said rods from turning after said heads have been inserted intosaid pocket of the clutch member.

6. A hoisting apparatus, including a drum shaft, a winding drum mountedto revolve on said shaft, a clutch member mounted on said shaft andhaving means for causing the clutch member to revolve with said shaft, aspring tending to move the clutch member into clutching engagement withthe drum, and manually operated means for disengaging the clutch fromthe drum, including teeth on said frame, a manually operated leverhaving teeth co-operating with said first teeth whereby when said leveris turned saidteeth will cause axial movement of said lever, a plateadapted to be moved by the axial movement of said lever, rods mounted toslide axially in said frame, and connected with said plate, enlargedheads on said rods, said clutch member having an annular pocket toreceive said heads, and having an annular opening through.

which said rods project, and a spring surrounding each of said rods andpressing said rods towards said clutch member.

'7. In a hoisting apparatus a drum shaft, a winding drum mounted torevolve on said shaft, means for operating said drum shaft, a clutchmember revolvable with said shaft and adapted to be moved axially toengage and disengage said drum, a spring for moving said clutch intoengagement with said drum, and means for moving said clutch to disengageit from said drum, including a lever, a manually operated leverpivotally connected with said first lever by a breakjoint whereby saidsecond lever may be moved pivotally in one direction in relation to saidfirst lever, and whereby movement of the second lever in the oppositedirection will cause said first lever to be operated, a controller forsaid motor and means connected with said second mentioned lever foroperating said controller.

8. A hoisting apparatus including a drum shaft, a drum revolvablethereon, a motor for operating the same, a clutch member revolving withsaid shaft and adapted to be moved axially operating the same,

thereof into and out of clutching engagement with said drum, a springfor moving the clutch member into engagement with the drum, a manuallyoperated lever for disengaging the clutch from said drum, a second leverpivotally connected with said first lever by a break-joint, a controllerfor said motor and means connected with said second lever for operatingthe controller, said second lever being adapted to be moved in onedirection to start the motor without moving said first lever and adaptedto be moved in the opposite direction to operate the controller to stopthe motor and to move said first lever and thereby disengage the clutchfrom the drum.

9. A hoisting apparatus including a drum shaft, a drum revolvablethereon, a motor for with said shaft and adapted to be moved axiallythereof into and out of clutching engagement with said drum, a springfor moving the clutch member into engagement with the drum, 7 a manuallyoperated lever for disengaging the clutch from said drum, a second leverpivotally connected with said first lever by a break-joint, a controllerfor said motor and means for connecting the same with the second lever,a brake band co-operating with said drum and means whereby said firstlever will apply the braking action on said drum, said second leverbeing adapted to be moved pivotally in relation to said first lever inone direction to start the motor and when moved in an opposite directionfrom the normal position to operate said first lever and to therebydisengage said clutch and tighten said brake band on said drum.

10. In a hoisting apparatus a drum shaft, a winding drum mounted torevolve on said shaft, a motor for driving said shaft, a clutch memberrevolvable with said shaft and adapted to be moved axially to engage anddisengage said drum, and means for shifting said clutch, including alever, a manually operated lever connected with said first lever by abreak-joint whereby said second lever may be moved pivotally in onedirection in relation to said first lever and where'- by movement of thesecond lever in the opposite direction will cause said first lever to beoperated to shift said clutch, a controller for said motor and meansconnected with said second mentioned lever for operating saidcontroller.

11. A hoisting apparatus including a drum shaft, a drum revolvablethereon, a motor for operating the shaft, a brake for controlling theoperation of said drum, a controller for said motor, a lever controllingthe actuation of said brake, a second lever connected with said first aclutch member revolving.

lever by a break-joint whereby said second lever may be actuated in onedirection without operating said first lever and whereby the operationof said second lever in another direction will actuate said first leverto control the brake, and means connecting said controller with saidsecond lever whereby the latter will control the operation of the motor.

12. The combination of a shaft, a winding drum mounted to revolve uponsaid shaft, said shaft having peripheral grooves, washers composed ofseparable segments adapted to be assembled to form a ring projectingpartly into said grooves of the shaft and adapted to abut the hub of thewinding drum to prevent axial move-

